278 lines
6.9 KiB
C
278 lines
6.9 KiB
C
/*-
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* Copyright (c) 2003-2004 Networks Associates Technology, Inc.
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* Copyright (c) 2006 SPARTA, Inc.
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* Copyright (c) 2008 Apple Inc.
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* Copyright (c) 2009 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project in part by Network
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* Associates Laboratories, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"),
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* as part of the DARPA CHATS research program.
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*
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* This software was enhanced by SPARTA ISSO under SPAWAR contract
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* N66001-04-C-6019 ("SEFOS").
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*
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* This software was developed at the University of Cambridge Computer
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* Laboratory with support from a grant from Google, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_mac.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/sbuf.h>
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#include <sys/sdt.h>
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#include <sys/systm.h>
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#include <sys/vnode.h>
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#include <sys/mount.h>
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#include <sys/file.h>
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#include <sys/namei.h>
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#include <sys/sysctl.h>
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#include <sys/msg.h>
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#include <security/mac/mac_framework.h>
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#include <security/mac/mac_internal.h>
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#include <security/mac/mac_policy.h>
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static struct label *
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mac_sysv_msgmsg_label_alloc(void)
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{
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struct label *label;
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label = mac_labelzone_alloc(M_WAITOK);
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MAC_POLICY_PERFORM(sysvmsg_init_label, label);
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return (label);
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}
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void
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mac_sysvmsg_init(struct msg *msgptr)
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{
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if (mac_labeled & MPC_OBJECT_SYSVMSG)
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msgptr->label = mac_sysv_msgmsg_label_alloc();
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else
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msgptr->label = NULL;
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}
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static struct label *
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mac_sysv_msgqueue_label_alloc(void)
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{
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struct label *label;
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label = mac_labelzone_alloc(M_WAITOK);
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MAC_POLICY_PERFORM(sysvmsq_init_label, label);
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return (label);
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}
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void
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mac_sysvmsq_init(struct msqid_kernel *msqkptr)
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{
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if (mac_labeled & MPC_OBJECT_SYSVMSQ)
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msqkptr->label = mac_sysv_msgqueue_label_alloc();
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else
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msqkptr->label = NULL;
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}
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static void
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mac_sysv_msgmsg_label_free(struct label *label)
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{
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MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_destroy_label, label);
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mac_labelzone_free(label);
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}
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void
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mac_sysvmsg_destroy(struct msg *msgptr)
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{
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if (msgptr->label != NULL) {
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mac_sysv_msgmsg_label_free(msgptr->label);
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msgptr->label = NULL;
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}
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}
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static void
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mac_sysv_msgqueue_label_free(struct label *label)
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{
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MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_destroy_label, label);
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mac_labelzone_free(label);
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}
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void
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mac_sysvmsq_destroy(struct msqid_kernel *msqkptr)
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{
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if (msqkptr->label != NULL) {
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mac_sysv_msgqueue_label_free(msqkptr->label);
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msqkptr->label = NULL;
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}
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}
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void
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mac_sysvmsg_create(struct ucred *cred, struct msqid_kernel *msqkptr,
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struct msg *msgptr)
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{
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MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_create, cred, msqkptr,
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msqkptr->label, msgptr, msgptr->label);
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}
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void
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mac_sysvmsq_create(struct ucred *cred, struct msqid_kernel *msqkptr)
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{
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MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_create, cred, msqkptr,
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msqkptr->label);
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}
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void
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mac_sysvmsg_cleanup(struct msg *msgptr)
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{
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MAC_POLICY_PERFORM_NOSLEEP(sysvmsg_cleanup, msgptr->label);
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}
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void
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mac_sysvmsq_cleanup(struct msqid_kernel *msqkptr)
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{
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MAC_POLICY_PERFORM_NOSLEEP(sysvmsq_cleanup, msqkptr->label);
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}
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MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msgmsq, "struct ucred *",
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"struct msg *", "struct msqid_kernel *");
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int
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mac_sysvmsq_check_msgmsq(struct ucred *cred, struct msg *msgptr,
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struct msqid_kernel *msqkptr)
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{
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int error;
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MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgmsq, cred, msgptr,
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msgptr->label, msqkptr, msqkptr->label);
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MAC_CHECK_PROBE3(sysvmsq_check_msgmsq, error, cred, msgptr, msqkptr);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrcv, "struct ucred *",
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"struct msg *");
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int
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mac_sysvmsq_check_msgrcv(struct ucred *cred, struct msg *msgptr)
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{
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int error;
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MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrcv, cred, msgptr,
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msgptr->label);
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MAC_CHECK_PROBE2(sysvmsq_check_msgrcv, error, cred, msgptr);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msgrmid, "struct ucred *",
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"struct msg *");
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int
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mac_sysvmsq_check_msgrmid(struct ucred *cred, struct msg *msgptr)
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{
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int error;
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MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msgrmid, cred, msgptr,
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msgptr->label);
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MAC_CHECK_PROBE2(sysvmsq_check_msgrmid, error, cred, msgptr);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqget, "struct ucred *",
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"struct msqid_kernel *");
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int
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mac_sysvmsq_check_msqget(struct ucred *cred, struct msqid_kernel *msqkptr)
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{
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int error;
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MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqget, cred, msqkptr,
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msqkptr->label);
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MAC_CHECK_PROBE2(sysvmsq_check_msqget, error, cred, msqkptr);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqsnd, "struct ucred *",
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"struct msqid_kernel *");
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int
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mac_sysvmsq_check_msqsnd(struct ucred *cred, struct msqid_kernel *msqkptr)
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{
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int error;
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MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqsnd, cred, msqkptr,
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msqkptr->label);
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MAC_CHECK_PROBE2(sysvmsq_check_msqsnd, error, cred, msqkptr);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE2(sysvmsq_check_msqrcv, "struct ucred *",
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"struct msqid_kernel *");
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int
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mac_sysvmsq_check_msqrcv(struct ucred *cred, struct msqid_kernel *msqkptr)
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{
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int error;
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MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqrcv, cred, msqkptr,
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msqkptr->label);
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MAC_CHECK_PROBE2(sysvmsq_check_msqrcv, error, cred, msqkptr);
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return (error);
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}
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MAC_CHECK_PROBE_DEFINE3(sysvmsq_check_msqctl, "struct ucred *",
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"struct msqid_kernel *", "int");
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int
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mac_sysvmsq_check_msqctl(struct ucred *cred, struct msqid_kernel *msqkptr,
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int cmd)
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{
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int error;
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MAC_POLICY_CHECK_NOSLEEP(sysvmsq_check_msqctl, cred, msqkptr,
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msqkptr->label, cmd);
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MAC_CHECK_PROBE3(sysvmsq_check_msqctl, error, cred, msqkptr, cmd);
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return (error);
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}
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